If you have been asked for a Zipcode instead of a Postcode on the payment screen this is either because you are using a card that was registered in the USA or more likely because your phone is currently set to USA under 'Language & Region'. 

Don't worry, it's very easy to change to the UK. On iOS devices, just need to go to:

Settings - General - Language & Region - Region

Specify the UK as your chosen region.

Please don't hesitate to talk to us on chat if you have any problems though 😁. 

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